Despite a recent downturn in popularity, 3-D movies aren’t just going to prosper, according to one of their most vocal proponents. They are going to change the way stories are told, and may even change the structure of the art form.

“Slowly but surely, it is regaining the regard it was first held in,” Jeffrey Katzenberg, the chief executive of DreamWorks Animation said in an interview. “Internationally, it continues to explode.” …